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ICD-10-CM 2027

ICD-10 code for plana coxa

M91.2

Coxa plana

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Coxa › plana”. Page updated September 29, 2026.

About coding plana coxa

The ICD-10-CM code for plana coxa is M91.2 (Coxa plana).

Within M91 (juvenile osteochondrosis of hip and pelvis), M91.2 is specifically for coxa plana. Related codes cover juvenile osteochondrosis of pelvis (M91.0), juvenile osteochondrosis of head of femur [Legg-Calve-Perthes] (M91.1), Pseudocoxalgia (M91.3), coxa magna (M91.4), other juvenile osteochondrosis of hip and pelvis (M91.8) and unspecified (M91.9).

To report this condition, pick the subcode that matches the documentation: M91.20 (unspecified hip), M91.21 (right hip) and M91.22 (left hip).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Common questions about plana coxa ICD-10 codes

What is the ICD-10 code for plana coxa?

M91.2 — Coxa plana (a header code; report a more specific subcode).

Is M91.2 billable?

No. M91.2 is a header code. Report one of its more specific subcodes instead.